四体的

Benzoylated phenyl a - and B - 2 - thio - D - fructofuranosides were synthesized and coupled with protected sucrose acceptor to synthesize a - D - fructofuranoside - linkage stereospecifically by employing NIS/AgOTf as catalysts.

在果糖的合成研究中，合成了四苯甲酰基苯基果糖硫苷，并首次将其用作糖苷化反应的给体，在NIS/AgOTf的促进之下，与乙酰化保护的蔗糖受体反应，从而以高产率立体专一地合成了α构型的呋喃果糖苷。

First, the geometry optimization for 1-phenyldibenzophosphole and triphenylphosphine were carried out using quantum chemical AM1 method.

用量子化学AM1方法优化了1-苯基二苯并膦和三苯基膦的几何构型，比较了两种化合物的电子结构和空间结构，发现PDBP作为羰基合成铑膦催化剂的配体要优于三苯基膦；系统研究了PDBP的合成方法，其最佳合成条件为：在无水无氧的条件下，采用二乙胺锂与溴化四苯基膦摩尔比为3，反应温度为22 ℃，反应5 h，反应后酸化， pH值为1～2，产物收率可达到85％～88％。

It was confirmed that facultative apomixes is existed in coffee species based on emasculating treatment, cyto-genetic observe and SSR marker detection.

细胞遗传学观察发现咖啡四倍体类型材料(2n=4x=44)的多胚和多胚苗中含有天然的单倍体胚和单倍体小苗(2n=2X=22)；去雄处理后，可见子房膨大，其中5份材料获得了果实和种子，初步说明无融合生殖现象的存在；对小粒种品种间杂交F1代个体的SSR分析，发现多胚苗中存在与母本图谱相同且不携带父本特异带的后代以及携带双亲特异带的有性后代，表明子代有仅来自母本的无融合生殖个体分离出来。 3 建立了咖啡无融合生殖的分子鉴别方法。

Comparing as BA, 0.1mg·L〓 TDZ was more effective in inducing germinating and developing of buds, regenerating prolific caespitose buds via organogenesis, promoting rhizogenesis and activity of root system greatly, as a result, acclimation survival rate was improved significantly. When leaf segments, cut from in vitro plantlets, were placed on MS media containing 0.1mg·L〓 TDZ, adventitious buds regenerated from segments. After transferred to propagated and rooted media, adventitious buds would proliferate and come into full plantlets.

与BA相比，TDZ的细胞分裂素活性至少高出一个数量级，0.1mg·L〓的TDZ能有效地诱导四个基因型芋茎尖的萌动、生长、大量增殖丛生芽，促进试管苗根系发生，将根系活力提高2倍以上，显著提高了试管苗的驯化成活率；浓度为0.01mg·L〓的TDZ能诱导魁芋类型的芋离体叶片切块产生再生芽点，转接后可增殖不定芽并形成再生植株。

Frequent meteor impacts, fierce radiation, and harsh temperature fluctuations on Earth four billion years ago created an incredibly hostile environment for any half-formed, about-to-replicate complexity.

四十亿年前地球上频繁的陨石冲击，强烈的射线，大起大落的温差，给所有半成型、准备复制的复杂体造成了难以置信的恶劣环境。

The forming process for the high-strength, steel-base modified polyformaldehyde composite material in five-laver structure is to melt modified polyformaldehyde by heating and roll to make the melt polyformaldehyde permeate into the gaps gaps between the large-grained spherical copper powder and screw copper nails.

四层结构的钢基铜塑复合材料的成型过程，是将改性聚甲醛加热熔化，经轧制，使熔融的聚甲醛渗透到大颗粒球形铜粉的间隙中，解决了三层材料复合过程中，熔融的聚甲醛水平流动性强过垂直方向的渗透性，造成了结合强度低的缺陷，使聚甲醛层与铜粉及基体结合更牢固，提高了其承载和抗剪切的能力。

This analysis is divided into three levels: 1 the words with Chinese flavor, such as the Chinese foods, and the theory of the Five Elements; 2 the non-standard English the mothers speak; and 3 the rhetorical devices which take on the Chinese features, such as the metaphorical vehicle: the Queen Mother of the Western Skies and symbolisms.

带有中国文化特色的词语，如中国食品，生肖理论，五行理论，2）小说中四位母亲的非标准英语，3）带有中国文化特色的修辞格：中国特色的喻体和象征手法，这三个语言层次上的中国特色在小说中所产生的文体效果进行分析。

Maize inbreds belonging to 3 maize heterotic groups including Reid, Tangsipingtou and compound germplasm were studied to determine the influence of genotypes, media and plant regulators on the embryo-derived calius induction and green plant regeneration. Immature embryos (1.0~2.0 mm) from selfed ears were harvested as explants. Callus could be induced from all the tested inbreds. However, plant regeneration was only obtained in 12 genotypes.

以Reid、唐四平头和其它种质等3个杂种优势类群共19份玉米自交系为试验材料，以玉米幼胚作为外植体，研究了基因型、培养基和激素对玉米幼胚愈伤组织的诱导及植株再生的影响，结果表明供试材料均能进行愈伤组织的诱导，但是仅有12个自交系能再生植株。N6和改良N6培养基有助于提高愈伤组织的质量及其生长速度。2，4-D在愈伤组织的诱导中起着关键性作用。

Ray florets elongated faster than disc florets from phase P3, when tetrads of haploid microspores appeared, and the pigmentation of the ray floret began when the pollen grains showed germination apertures in the disc florets of the first whorl. The effects of light, sugar and GA3 on flower growth and development were investigated in vitro. Inflorescences in the P2 phase or later could grow and bloom in vitro, and sucrose, GA3 and light promoted flowering.

研究表明，分化完全的舌状花在P3期、即花粉细胞四分体出现之后长度超过盘状花，在盘状花的雄蕊出现具有萌发孔的花粉粒之后，舌状花开始着色。P2以后的花序经离体培养可以开放，光、糖和GA3对花序的生长和开放有显著的促进作用。

The claims of the learned work of the Anglican Dr. Pusey (The Doctrine of the Real Presence as contained in the Fathers, Oxford, 1855), who denied the cogency of the patristic argument for Transubstantiation, have been met and thoroughly answered by Cardinal Franzelin (De Euchar., Rome, 1887, xiv).

索赔的工作，学到的圣公会博士pusey （中庸真正的驻留载於父亲，牛津， 1855年），他否认了中肯的教父的说法，为陷於变体说，已经得到满足，并深刻回答了由红衣主教franzelin （德奥伊夏尔，罗马， 1887年，十四）。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。